Valorant Purchased Account Email Changed and I Lost Access After 30 Minutes

Today, I purchased a Valorant account. After logging in, I played for about 30 minutes without any issues and then logged out. However, when I tried to log back in about an hour later, I received a message saying that my username and password were incorrect.

I did not make any changes to the account credentials myself. Yet somehow, the email address linked to the account was changed, and now I can no longer access it. This situation is extremely frustrating, as I had just purchased the account and immediately lost access through no fault of my own.

I request urgent assistance to regain access to my account or receive a proper resolution for the money I spent.